Specification outer size 155.5mml x 78mmw x 22.5mmh Built-in flash 4mbit flash , 128mbit sdram Weight 145g Os linux Language multi language (unicode) Specification outer size 142mml x 82mmw x 25mmh Built-in flash 4mbit flash , 128mbit sdram Os linux Language multi language (unicode) Usb interface 2.0 high speed Hdd capability 40g Power supply 2300mah lithium-ion-polymer , recharge time 2 hours Operating time video play:3 hours Audio play:10 hours (lcd off) Caption support subtitle Work temperature 0-50 íµ Video play support format mpeg4, decoding divx3/4/5, xvid Display screen 4í»í», 480x272 resolution pixel Frame 30 frame/ s Bit rate 8mbps(720x480, 30frame/s) ííoutput ntsc/pal, video output Audio support format mp3, wma, ogg Input/output stereo input/ output Output range 20hz-20khz Earphone 3.5mm stereo earphone S/n ratio 90db above Lyric osd lyric, ldb Photo view file format jpeg, bmp Voice record record format mp3 Longest record time 500 hours (40g) Video record rec format video :mp4, audio:mp3 Rec time 20 hours Operation system pc cpu:200mhz above Windows 98se/me/2000(sp3 above)/xp Component av rca , usb cable , earphone, adapter , user manual No standard , accord custmors...à